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Çѱ¹Áö¹Ý°øÇÐȸ / v.18, no.5, 2002³â, pp.83-97
¾Ï¼®ÀÇ ºñ¼±Çü °Åµ¿Çؼ®À» À§ÇÑ ¼Õ»ó¸ðµ¨ °³¹ß
( A Damage Model for Predicting the Nonlinear Behavior of Rock )
Àå¼öÈ£;ÀÌÁ¤ÀÎ;ÀÌ¿¬±Ô; ´ë¿øÅäÁú(ÁÖ);¼­¿ï´ëÇб³ Áö±¸È¯°æ½Ã½ºÅÛ °øÇкÎ;±º»ê´ëÇб³ ÇØ¾çÀÀ¿ë°øÇкÎ;
 
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º» ¿¬±¸¿¡¼­´Â ¾Ï¼®ÀÇ ÃÖ´ë°­µµ ÀÌÀüÀÇ °¢ ¼Õ»ó´Ü°è¿¡¼­ ź¼ºÁ¤¼öÀÇ º¯È­·Î ³ªÅ¸³ª´Â ¼Õ»óƯ¼º°ú ÃÖ´ë°­µµ Èİŵ¿À» °í·ÁÇÒ ¼ö ÀÖ´Â ¼Õ»ó¸ðµ¨À» ½ÇÇèÀûÀ¸·Î °³¹ßÇÏ¿´´Ù. ÀÏÃà ¹× »ïÃà¾ÐÃà½ÇÇè °á°ú¸¦ Åä´ë·Î ¾Ï¼®ÀÇ ¼Õ»ó±âÁØÀ» °áÁ¤ÇÏ¿´°í, °¢ ¼Õ»ó´Ü°è¿¡¼­ ź¼ºÁ¤¼öÀÇ º¯È­¸¦ ±¸¼Ó¾ÐÀÇ ÇÔ¼ö·Î ÃÖÀûÈ­½ÃÄ×´Ù. ¶ÇÇÑ ÃÖ´ë°­µµ ÈÄ Hoek-Brown»ó¼ö mr°ú srÀ» ÀÌ¿ëÇÏ¿© ÃÖ´ë°­µµ ÈÄ °Åµ¿À» ¸ð»çÇÏ¿´´Ù. °³¹ßµÈ ½ÇÇè ¼Õ»ó¸ðµ¨À»FLAC$^{2D}$ÀÇ FISH ÇÔ¼ö·Î ±¸ÇöÇÏ¿© ¼öÄ¡ÇØ¼®À» ½Ç½ÃÇÏ¿´´Ù. Hoek-Brown ÃÖ´ë°­µµ ÈÄ »ó¼öµéÀÌ ÇØ¼®°á°ú¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ºÐ¼®ÇÑ °á°ú, ÀÏÃà¾ÐÃà°­µµ´Â mr°ú sr ¸ðµÎ¿¡ ÀÇÇØ ¿µÇâÀ» ¹ÞÀ¸³ª 5,¿¡ ÀÇÇØ ´õ Å©°Ô Á¿ìµÇ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ¹Ý¸é m,Àº ÃÖ´ë°­µµ ÈÄÀÇ ÀÀ·Â-º¯Çü·ü °î¼±ÀÇ ±â¿ï±â¿¡ Å« ¿µÇâÀ» ³¢Ä¡´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ºÐ¼®À¸·ÎºÎÅÍ ¾ò¾îÁø ÃÖÀû ¼Õ»ó¸ðµ¨À» ¼öÄ¡ÇØ¼®¿¡ Àû¿ëÇÑ °á°ú ½ÇÇè½Ç ½ÃÇèÀ¸·ÎºÎÅÍ ¾ò¾îÁø ÃÖ´ë °­µµ¿Í ¾Ï¼®ÀÇ ¼Õ»ó¿¡ µû¸¥ °­¼º º¯È­¸¦ Àß ¿¹ÃøÇÏ¿´´Ù.´Ù.
An experimental model which considers post-peak behaviors and pre-peak damage characteristics representing changes of elastic moduli in each damage level was developed. From experiments, some damage thresholds of rocks were determined, and regression analyses were carried out in order to represent changes of elastic moduli in each damage level as functions of confining pressure. In addition, it was intended to simulate post-peak behaviors with Hoek-Brown constants, $m_r;and;s_r$ for post-failure. The developed experimental model was implemented into $FLAC^{2D}$ by a FISH function. From results of parametric studies on Hoek-Brown constants for post-peak, it was revealed that uniaxial compressive strength more highly depends upon $s_r$, although it depends on both $m_r;and;s_r$. It was also shown that the post-peak slopes of stress-stain curves depend mainly on $m_r$. When the optimum models obtained from parametric studies were applied to numerical analysis, they predicted maximum strengths obtained from experiments and well simulated stiffness changes due to damage levels.
 
Ű¿öµå
Damage model;Damage threshold Elastic moduli;Hoek-Brown constants;Post-failure;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.18, no.5, 2002³â, pp.83-97
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200211921407775)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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